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The Role of Rivers in the United states 19th Century Territorial Expansion from the Mississippi River to the Pacific Ocean

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Open Journal of soil science 2023年第12期13卷 517-533页

作者： kenneth Ray Olson Department of Natural Resources and Environmental sciences College of Agricultural Consumer and Environmental Sciences University of Illinois Urbana USA

This study explores the key role of rivers in the westward expansion of the United states during the 19th century. In the early 1800s, President Jefferson envisioned a United states that extended from the Atlantic to the Pacific Ocean. At the time, the entire United states territory was located between the Atlantic Ocean and the Mississippi River. Much of the land west of the Mississippi River was claimed by spain, France, or Canada. In 1803, President Jefferson was able to purchase the Missouri River watershed from France via the Louisiana Purchase. This allowed the United states to extend its land claim west from the confluence of the Missouri and Mississippi Rivers to the head waters of the Missouri River at the continental divide in the Rocky Mountains. President Jefferson commissioned William Clark and Meriwether Lewis, in 1803, to explore, discover and describe the Missouri River watershed and find a water route to the Pacific Ocean. The Lewis and Clark Corps of Discovery trip found no such waterway link but did continue to explore the Pacific Northwest lands north and west of the continental divide. The only way that the Pacific Northwest could be claimed as part of the United states was for Americans to settle there before the Canadians did. starting in the 1820s, many Americans traveled via the Oregon Trail to the Willamette Valley (Land of Flowing Milk and honey) in Oregon. The primary objectives of this study are to document how the United states: 1) extended its land claims west from the Mississippi River to the North American continental drainage divide;2) established an American claim to the Pacific North West territory;and 3) fulfilled President Jefferson’s vision of a United states extending from the Atlantic to the Pacific Ocean.

关键词： Louisiana Purchase President Thomas Jefferson Oregon Trail Corps of Discovery sacagawea Missouri River

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No signature of selection on the C-terminal region of glucose transporter 2 with the evolution of avian nectarivory

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Avian Research 2020年第4期11卷 380-390页

作者： Alexander M.Myrka Tooba shah Jason T.Weir kenneth C.Welch Jr. Department of Cell and systems Biology University of Toronto25 Harbord St.TorontoON M5S 3G5Canada Department of Biological sciences University of Toronto Scarborough1265 Military TrailTorontoON M1C 1A4Canada Department of Ecology and Evolutionary Biology University of Toronto Scarborough1265 Military TrailTorontoON M1C 1A4Canada

Background:Flying birds,especially those that hover,need to meet high energetic *** that meet this demand through nectarivory face the added challenges of maintaining homeostasis in the face of spikes in blood sugar associated with nectar meals,as well as transporting that sugar to energetically demanding *** has evolved many times in birds and we hypothesized that the challenges of this dietary strategy would exert selective pressure on key aspects of metabolic ***,we hypothesized we would find convergent or parallel amino acid substitutions among different nectarivorous lineages in a protein important to sensing,regulating,and transporting glucose,glucose transporter 2(GLUT2).Methods:Genetic sequences for GLUT2 were obtained from ten pairs of nectarivorous and non-nectarivorous sister *** performed PCR amplification of the intracellular C-terminal domain of GLUT2 and adjacent protein domains due to the role of this region in determination of transport rate,substrate specificity and ***:Our findings have ruled out the C-terminal regulatory region of GLUT2 as a target for selection by sugar-rich diet among avian nectarivores,though selection among hummingbirds,the oldest avian nectarivores,cannot be ***:Our results indicate future studies should examine down-stream targets of GLUT2-mediated glucosensing and insulin secretion,such as insulin receptors and their targets,as potential sites of selection by nectarivory in birds.

关键词： GLUT2 Nectarivory Avian Glucosensing Glucose Diet Insulin signalling

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QT间期延长犬模型长间歇依赖性尖端扭转型室性心动过速机制的跨壁光学标测研究

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中华心血管病杂志 2005年第6期33卷 553-556页

作者：刘金秋杨延宗 David s.Rosenbaum kenneth R.Laurita 大连医科大学附属第一医院心脏中心 116011 美国俄亥俄克里夫兰凯斯西储大学生物医学工程系心血管研究中心

目的在QT间期延长(LQT)的条件下,探讨长间歇依赖性尖端扭转型室性心动过速(TdP)的电生理机制。方法同步光学标测犬左心室楔形心肌块跨壁动作电位。正常对照(n=6块),应用d-索他洛尔模拟LQT2(n=6块),应用海银花(ATX-Ⅱ)模拟LQT3(n=11块)... 详细信息

目的在QT间期延长(LQT)的条件下,探讨长间歇依赖性尖端扭转型室性心动过速(TdP)的电生理机制。方法同步光学标测犬左心室楔形心肌块跨壁动作电位。正常对照(n=6块),应用d-索他洛尔模拟LQT2(n=6块),应用海银花(ATX-Ⅱ)模拟LQT3(n=11块)。起搏刺激模拟长短周期现象。结果在LQT的条件下,长间歇明显延长了平均动作电位[对照组:规律刺激s1s1(291±27)ms,长间歇(307±28)ms,P>0.05;LQT2组:s1s1(356±20)ms,长间歇(381±25)ms,Ps1s1(609±92)ms,长间歇(675±98)ms,Ps1s1(24±6)ms,长间歇(27±6)ms,P>0·05;LQT2组:s1s1(35±9)ms,长间歇(46±11)ms,Ps1s1(121±85)ms,长间歇(171±98)ms,P<0.05],长间歇使M细胞的岛形分布更加明显。在LQT3组,长间歇之后更容易出现早期后除极、触发活动以及TdP(82%,P<0.05);M细胞岛的边缘是复极化阶差最大的部位,该部位也是形成单向传导阻滞和缓慢传导的部位。结论在LQT条件下,M细胞岛是TdP的发生和维持的关键部位。

关键词： QT间期延长心电图犬动物模型长间歇依赖性尖端扭转型室性心动过速病理机制跨壁光学

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Mass budgets of the Lambert, Mellor and Fisher Glaciers and basal fluxes beneath their flowbands on Amery Ice shelf

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science China Earth sciences 2007年第11期50卷 1693-1706页

作者： kenneth C. JEZEK Beata M. CsAThó Ute C. hERZFELD Katy L. FARNEss Philippe hUYBREChTs Byrd Polar Research Center The Ohio State University Columbus OH 43210 USA CIREs/NsIDC University of Colorado Boulder Boulder CO 80309-0449 USA Departement Geografie Vrije Universiteit Brussel Pleinlaan 2 B-1050 Brussels Belgium Alfred-Wegener-Institut für Polar-und Meeresforschung Postfach 120161 D-27515 Bremerhaven Germany

We used in situ measurements and remote-sensing data sets to evaluate the mass budgets of the Lambert, Mellor and Fisher Glaciers and the basal melting and freezing rates beneath their flowbands on the Amery Ice shelf. Our findings show the Lambert and Mellor Glaciers upstream of the ANARE Lambert Glacier Basin (LGB) traverse may have positive imbalances of 3.9±2.1 Gt a-1 and 2.1±2.4 Gt a-1, respectively, while the Fisher Glacier is approximately in balance. The upstream region as a whole has a positive imbalance of 5.9±4.9 Gt a-1. The three same glaciers downstream of the ANARE LGB traverse line are in negative imbalance, where the whole downstream region has a negative imbalance of -8.5±5.8 Gt a-1. Overall the mass budgets of the Lambert, Mellor, and Fisher Glaciers are close to bal-ance, and the collective three-glacier system is also nearly in balance with a mass budget of -2.6±6.5 Gt a-1. The significant positive imbalances for the interior basin upstream of the ice-movement stations established in the early 1970s (GL line) reported previously are possibly due to an overestimate of the total accumulation and an underestimate of the ice flux through the GL line. The mean melting rate is -23.0±3.5 m ice a-1 near the southern grounding line, which decreases rapidly downstream, and transitions to refreezing at around 300 km from the southern extremity of the Amery Ice shelf. Freezing rates along the flowbands are around 0.5±0.1 to 1.5±0.2 m ice a-1. The per-centage of ice lost from the interior by basal melting beneath the flowbands is about 80%±5%. The total basal melting and refreezing beneath the three flowbands is 50.3±7.5 Gt ice a-1 and 7.0±1.1 Gt ice a-1, respectively. We find a much larger total basal melting and net melting than the results for the whole Amery Ice shelf derived from previous modeling and oceanographic measurements.

关键词： mass budget basal melting and freezing Lambert Glacier Basin Amery Ice shelf East Antarctica

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MCAD/MCsD Visual Basic .NET XML Web服务与服务器组件开发学习指南考试70-310 4

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2004年

作者： kenneth s.Lind 天宏工作室译

本书介绍了如何创建Windows服务和Windows服务组件，创建和使用.NET远程处理对象，创建和使用sOAP扩展，实例化和调用XML Web服务等。

ISBN: (纸本)7302083800

本书介绍了如何创建Windows服务和Windows服务组件，创建和使用.NET远程处理对象，创建和使用sOAP扩展，实例化和调用XML Web服务等。

关键词： BAsIC语言程序设计

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Terrestrial records of the early Albian Ocean Anoxic Event:Evidence from the Fuxin lacustrine basin,NE China

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Geoscience Frontiers 2022年第1期13卷 138-157页

作者： Xiao-Tao Xu Long-Yi shao kenneth A.Eriksson Bo Pang shuai Wang Cheng-Xue Yang hai-hai hou College of Geoscience and surveying Engineering China University of Mining and Technology(Beijing)Beijing 100083China shandong Key Laboratory of Depositional Mineralization&sedimentary Mineral Shandong University of Science and TechnologyQingdao 266590China Department of Geosciences Virginia TechBlacksburgVA 24061USA Liaoning Province Geology and Minerals Group Energy Geology Co. Ltd.Shenyang 110000China Institute of Earth sciences China University of Geosciences(Beijing)Beijing 100083China College of Mining Liaoning Technical UniversityFuxin 123000China

The early Albian Oceanic Anoxic Event 1 b(OAE 1 b) is well documented in the Tethys, Pacific and North Atlantic, but few studies have evaluated whether or not terrestrial records of OAE 1 b exist. In order to identify terrestrial records of the early Albian OAE 1 b and to infer possible driving mechanisms, an integrated multi-proxy study from the late Aptian to Albian in the Fuxin lacustrine basin was conducted,including thick, organic-rich black mudstones, total organic carbon(TOC), organic carbon isotopes(d13 Corg), mercury concentration(hg) and results from pyrolysis analyses(s2, Tmaxand hI). Results show three distinct short-term negative d13 Corgexcursions corresponding with relatively high TOC values,which could be counterparts of the Kilian, Paquier and Leenhardt sub-events of the early Albian OAE1 b. Atmospheric CO2 concentration(p CO2) recovered from C3 plant d13 Corgcompositions indicates an increasing trend in Unit C during the early Albian, and there are three short-term increases of p CO2 corresponding to the three sub-events of OAE 1 b at this time interval. We infer that a trend of increasing p CO2 during the Kilian sub-event in the study area is closely related to volcanism. Continental weathering calculated using chemical weathering indices(CIA, WIP and MIA(O)) show an increasing trend during the OAE 1 b interval, likely resulting from warmer and more humid conditions. Mixed sources of terrestrial plants and lacustrine plankton demonstrated by pyrolysis analyses(hI vs. Tmaxand s2 vs. TOC), indicate a terrestrial contribution to the organic-rich sediments of the Kilian, Paquier and Leenhardt sub-events of OAE 1 b. We suggest that a CO2-forced greenhouse effect during the early Albian might have triggered the relatively warm and humid palaeoclimatic conditions, and intensified chemical weathering that combined to create high nutrient and organic matter levels that were flushed into lakes contributing to eutrophication and anoxia in lacustrine and in c

关键词： Fuxin Basin Early Albian Organic carbon isotopes Ocean Anoxic Event 1b Terrestrial records

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Expression of matrix metalloproteinases 2 and 9 in human gastric cancer and superficial gastritis

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World Journal of Gastroenterology 2010年第12期16卷 1500-1505页

作者： Clara Luz sampieri sol de la Pea Mariana Ochoa-Lara Roberto Zenteno-Cuevas kenneth León-Córdoba Institute of Public health Veracruzana University Biomedical sciences Doctoral Program Institute of Health SciencesVeracruzana University Dr.Miguel Dorantes Mesa hospital

AIM:To assess expression of matrix metalloproteinases 2(MMP2)and MMP9 in gastric cancer,superficial gastritis and normal mucosa,and to measure metalloproteinase ***:MMP2 and MMP9 mRNA expression was determined by quantitative real-time polymerase chain *** was carried out using three different *** were analyzed by quantitative gelatin zymography(qGZ).REsULTs:18s ribosomal RNA(18sRNA)was very highly expressed,while hypoxanthine ribosyltransferase-1(hPRT-1)was moderately ***2 was highly expressed,while MMP9 was not detected or lowly expressed in normal tissues,moderately or highly expressed in gastritis and highly expressed in *** expression of 18sRNA and hPRT-1 showed no significant *** differences in MMP2 and MMP9 were found between cancer and normal tissue,but not between gastritis and normal *** quantification of MMP9 echoed this pattern,but differential expression of MMP2 proved *** by qGZ indicated significant differences between cancer and normal tissue in MMP-2,total MMP-9,250 and 110 kDa ***:MMP9 expression is enhanced in gastric cancer compared to normal mucosa;interpretation of differential expression of MMP2 is difficult to establish.

关键词： Gastric cancer superficial gastritis Matrix metalloproteinases Quantitative real-time polymerase chain reaction Quantitative zymography

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NiFeRuO_(x)nanosheets on Ni foam as an electrocatalyst for efficient overall alkaline seawater splitting

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Frontiers of Chemical science and Engineering 2023年第11期17卷 1698-1706页

作者： Yu Liu Lin Chen Yong Wang Yuan Dong Liang Zhou susana ICórdoba de Torresi kenneth IOzoemena Xiao-Yu Yang state Key Laboratory of Advanced Technology for Materials synthesis and Processing&International school of Materials science and Engineering&school of Materials science and Engineering&shenzhen Research Institute&Laoshan Laboratory Wuhan University of TechnologyWuhan 430070China Instituto de Química Universidade de São Paulo05508-080 São PauloBrazil Molecular sciences Institute School of ChemistryUniversity of the WitwatersrandJohannesburg 2050South Africa

The electrocatalyst NiFeRuO_(x)/NF,comprised of NiFeRuO_(x)nanosheets grown on Ni foam,was synthesized using a hydrothermal process followed by thermal ***_(x)/NF displays high electrocatalytic activity and stability for overall alkaline seawater splitting:98 mV@10 mA∙cm^(−2)in hydrogen evolution reaction,318 mV@50 mA∙cm^(−2)in oxygen evolution reaction,and a cell voltage of 1.53 V@10 mA∙cm^(−2),as well as 20 h of durability.A solar-driven system containing such a bifunctional NiFeRuO_(x)/NF has an almost 100%Faradaic *** NiFeRuO_(x)coating around Ni foam is an anti-corrosion layer and also a critical factor for enhancement of bifunctional performances.

关键词： NiFeRuO_(x)nanosheets Ni foam electrocatalysis overall seawater splitting solar-driven system

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Microelectronic circuits:英文版 4th ed.

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丛书名：国外电子与通信教材系列

2004年

作者： (加)Adel s.sedra kenneth C.smith

本书由三个部分构成: 第一部分介绍器件和基本电路;第二部分讲解模拟电路;第三部分介绍数字电路。

ISBN: (数字)7120000845

ISBN: (纸本)7120000845

本书由三个部分构成: 第一部分介绍器件和基本电路;第二部分讲解模拟电路;第三部分介绍数字电路。

关键词： Integrated circuits.

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Role of Nitrite in Tumor Growth, symbiogenetic Evolution of Cancer Cells, and China’s successes in the War against Cancer

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Journal of Cancer Therapy 2011年第5期2卷 601-606页

作者： kenneth J. hsu Chao s. huangfu Min Z. Qin 不详

statistics and experiments indicate a correlation between cancer mortality and nitrite in drinking water. Nitrite is a reductant that can deprive a cell of oxygen;it is also an oxidant that can be a substrate in anaerobic ammonium oxidation, the metabolic mode of the anammox bacteria. Eukaryote cells evolved through a fusion of anaerobic and aerobic bacteria. We postulate that an anammox bacterium sought refuge in a fusion with a membrane-bound cluster of aerobic bacteria. While the latter evolved into mitochondria organelles, the former became the nucleus of a prokaryote cell. Eventually, oxidative phosphorilation is the characteristic metabolic pathway of normal eukaryote cells, and we postulate that anammox is the protein-catabolism pathway for cancer cells. The metabolism consumes nitrite and explains thus the link between nitrite and cancer.

关键词： Nitrite Tomor symbiogenetic Evolution

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